patchfast_export.c: Fix a compiler warning

> In particular, gcc complains thus:
> 
>         CC vcs-svn/fast_export.o
>     vcs-svn/fast_export.c: In function 'fast_export_begin_note':
>     vcs-svn/fast_export.c:77: warning: long long unsigned int format, \
>         different type arg (arg 2)
> 
> In order to fix the warning, we cast the second size_t argument in
> the call to printf to uintmax_t.
> 
> Signed-off-by: Ramsay Jones <ramsay@ramsay1.demon.co.uk>
> ---
> 
> Hi Florian,
> 
> If you need to re-roll your patches in the 'fa/remote-svn' branch, could
> you please squash this fix into them. [This was implemented on top of
> commit 2ce959ba, but you will probably want to make the equivalent change
> to commit d319a37c ("Create a note for every imported commit containing
> svn metadata", 17-08-2012) instead. Note that, because of the context
> lines in the patch, it won't apply as-is.]

> 
> Thanks!
> 
> ATB,
> Ramsay Jones

> 
>  vcs-svn/fast_export.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/vcs-svn/fast_export.c b/vcs-svn/fast_export.c
> index c780d32..dd09c7d 100644
> --- a/vcs-svn/fast_export.c
> +++ b/vcs-svn/fast_export.c
> @@ -74,7 +74,7 @@ void fast_export_begin_note(uint32_t revision, const char
> *author, size_t loglen = strlen(log);
>  	printf("commit %s\n", note_ref);
>  	printf("committer %s <%s@%s> %ld +0000\n", author, author, "local",
> timestamp); -	printf("data %"PRIuMAX"\n", loglen);
> +	printf("data %"PRIuMAX"\n", (uintmax_t) loglen);
>  	fwrite(log, loglen, 1, stdout);
>  	if (firstnote) {
>  		if (revision > 1)

>> If you need to re-roll your patches in the 'fa/remote-svn' branch, could
>> you please squash this fix into them. [This was implemented on top of
>> commit 2ce959ba, but you will probably want to make the equivalent change
>> to commit d319a37c ("Create a note for every imported commit containing
>> svn metadata", 17-08-2012) instead. Note that, because of the context
>> lines in the patch, it won't apply as-is.]
>
> Ok, I'll add it to the next version. This warning only occurs when building 
> for 32bit, thus I never saw it. There would be a format flag for printf that 
> sprecifies the platform's size_t integer type: "z".